Raypak RAYTHERM® Low NOx Water Heater, 181- 401

BASIC DATA 

*WH3-401 (2-Stage) has input 375,000BTUH.

Available Firing Modes

Features:

• Rugged All-Brass Headers
  Resists corrosion, easily removed for inspection or service. AB 1953 compliant.  Glass-lined cast-iron headers and cupro-nickel tubes are available as options.
• Finned Copper Tube Heat Exchanger 
  Single bank, straight through design delivers lowest pressure drop. Integral fins have ten times the heat transfer surface of plain tubes.
• 82% Efficiency.  Cat I Venting.
• Indoor/Outdoor Certified.
• NOx emissions under 55 PPM (40ng/j). Consult local emissions requirements prior to ordering. 
• Corrosion Resistant Steel
  Fittings are brush galvanized against rust. Heat shields are corrosion-resistant steel. Jacket has Polytuf powder coat finish.
• 24-Volt Controls
  Totally enclosed for protection. Door is easily removed for inspection and service.
• Floating Return Header
  Immunizes heat exchanger from thermal shock.
• Tube Sheet and “O” Ring Construction
  Eliminates repair and maintenance problems associated with rolling tubes directly into a casting.
• Interlocking Refractory Panels
  Sealed corners, reduces radiation loss.
• Stainless Steel Burners
  Maintains precise combustion at all firing rates, burns quietly, won’t clog or corrode.
• Slide-Out Burner Tray
  Allows easy inspection and service.
• Spark-to-Pilot Ignition
  Most dependable ignition method available.
• Available for Natural Gas Only.